It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whenever Jibril came to me, he always commanded me to use the tooth-stick (miswak), until I feared that I would wear away the front of my mouth."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7816